Exhaust-valve for hydrocarbon-engines.



H. n. DUKE. EXHAUST VALVE FOR HYDROCABBON ENGINES. APPLICATION FILED JULY 28. IBIS. 1,227,254. Patented May 22, 1917.

NITED sTA'rEs PATENT oEEIcE.

, HNRY R. LUKE, OF MOBILE, ALABAMA, ASSIGNOR 0F ONE-HALF TO A.V O. THAYER,

OF MOBILE, ALABAMA.

' ExHAUs'r-VALVE Eon HYDnocAEBoN-ENGINES.

To all whom it may concern.'

Be it known .that I, HENRY R. DUKE, a

v'citizen `of the United States, residing at Mobile, in the county of Mobile and State of Alabama, have invented certain new and useful. Improvements in Exhaust-Valves for Hydrocarbon-Engines, of which the following is a speciication.

This invention relates tol exhaust valves for hydrocarbon engines. 'I have two principal objects in view, one the production of an exhaust vvalve of advantageouscharacter, which is adapted for incorporation in hydrocarbon engines whether of L, T-head 'or other type without change in structure of the engine. Another feature is the provision of an exhaust valve which can be opened without .any retarding effect on the valve gear.

In the drawings accompanying and forming part of the present specification I have shown in detail one convenient form of embodiment of the invention which to enable I those skilled in the art to practice the lsame will be set forth fully in thefollowing description. I do not restrict myself to this disclosure; I may depart therefrom in several respects within the scope of the vinvention defined by the claims following said description.

Referring to said drawings: Figure 1 is a vertical sectional view of y the cylinder of a hydrocarbon engine provided with valve mechanism invo ving t e invention, the valve and its cap being in elevation and the valve being closed. Fig. 2 is a similar view, the valvesbeing ope'n. l

Fig. 3 .is a practically similar view but with the valve and cap 1n section and on a larger scale.

Like characters refer to like partsthroughout the several views.

specification of Letters Patent.

into the port 7, being discharged from the latter to the atmosphere or into a manifold where 4they can be disposed of in any desirable manner. Generally speaking the foregoing is a familiar type of cylinder construction.

'The valve is denoted in a general way by Patented May 22, 1917.

Application filed July 28, 1916. Serial No. 111,850.

10 and it comprises a base or wall as 11 and an olf-standing flange 12 of circularv form, the flange projecting from the margin of the body or valve proper 11. The valve ,'10is, therefore, of cupped form.. On the valve proper or disk-like body 11 of the puppet valve is a tapered portion 13 which fits the tapered seat 9when the valve is closed as shown in Fig. 1. From the valve there extends the stem 14, this stem being usually integral with the one-piece cup-like valve 10. The casing 3 is bushed to receive said stem and below the casingand around the stem is a spring'15 which tends constantly to close the valve. The valve is shown. in said relation in Fig. 1 and as open inFig. 2, to permitthe burntgases or exploded charge to escape to-atmosphere in the manner already indicated.

Threaded into the casing 3 is the reduced part of acap-as 16 and although this cap and the valve 10- are shown as bein cylindrical, this may not be necessary in al cases.

Byreducing the cap 16 there is produced thereon the shoulder 17 which fits against the casing 3, although this is a detail. This cap 16 presents a convenient means for receivingfor sliding movement the cylindrical cupped valve 10.' The flanged part 12 of the valve may be provided periphera-ll;r with packing 18 serving its customary function.v In the body or web 11 of the valve are one or more ports as 19 which provide for the proper venting of the `air confined between the valve `10 and cap 6. It will be noted that the chamber 6 surrounds the `valve, the result being that on exhaust the valve is balanced, there being no tendency on the part of the spent .gases to 'move the valve laterally..

point of importance. I

The casing has a port 7 leading from the chamber 6 to atmosphere, while said chamber 6 is connected with the piston space or chamber of the cylinder 2 by way of a port or passage 5, the two ports 5 and 7 constituting collectively exhaust passage means intersected by the valve chamber 6. is to say on exhaust the valve is surrounded by the burnt gases and is exactly' balanced,

which is a feature of the utmost consideration.

I also desire to call a tention to another puppet valves of all gasengines with which I am familiar, the exhaust acts against the upper surface of the valve; in other words the old puppet valvesl must be opened against the exhaust. Aside from the advantage of balancing the valve in the manner noted, is the prime consideration of directing the exhaust sidewise against the valve, by reason of which there is no tendency on the part of the valve when opened to be impeded; as a matter of fact on the initial opening of the valve by cam or other means, the maximum opening 'is actually facilitated by the exhaust.

As the valve opens it moves upward in the illustration made and owing to the fact that an opening or openings as 19 are provided in said valve, there is no possibility of air being compressed in the cap 16, because on the exhaust movement of the'valve, the air between the valve and the cap escapes to atmosphere by way of the port 7.

It will be seen that the valve in the casing is open at one end and that it has a wall at the other, the stem extending from the wall in a direction away from the open end of the valve. The cap which receives the .valve is externally threaded and with the valve and necessary adjuncts can, as I have already observed, present an article of manufacture susceptible of incorporation without change or certainly appreciable change in ordinary hydrocarbon engines.

What I claim is:

1. The combination. of the cylinder and' valve casing of a hydrocarbon engine, a pup-,

pet valve in said casing, open at one end and having a wall at the other end, the wall That p seat, and spring means acting against said stem to hold the valve normally closed against said seat.

2. The combination of the cylinder and valve casing of a hydrocarbon engine, a puppet valve in the casing, an imperforate cap fitted in the casing to slidingly receive the` valve, the casing having an exhaust passage and the valve having a port to connect the exhaust passage with the interior of the cap, said valve also having a stem extendmg therefrom'in a d1rect1on away from the cap.

puppet valve in said casing, a cap disposed externally of and fitted into the casing to slidingly receive the valve, the casing hav- -ing a chamber surrounding the valve in communication with the cylinder to laterally balance the valve, the casing having a passage leading to atmosphere and also having a port connecting the passage and atmosphere, said port being provided with a seat, the valve having 'a stem extending 3. The combination of the cylinder' andy valve casing of 'a hydrocarbonengine, a

therefrom in av direction away from the cap and also having a port therethrough for the conduct of exhaust gases into the cap when valve is opened, a stem connected with the valve and extending therefrom in a direction away from the cap, and means acting against the valve to hold the same normally against its seat. 4

In testimony whereof I ailixmy signature in the presence of two witnesses.'

`Witnesses: l

J J. BLoCKsHED, A. H. MALIETT.

HENRY R. DUKE. 

